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This section provides the following information about each attribute of the CSV product:
The name of the attribute and what it is describing.
The nature of the attribute, for example a numeric value or a code list value.
Describes how many times this element is expected to be populated in the data. An attribute may be optional or mandatory; these are denoted by:
‘1’ – Mandatory - There must be a value.
‘0..1’ – Optional – If populated a maximum of one attribute will be returned. These values may be used in combination.
Unique identifier for the relationship. Made up of a concatenated string in the format: {Data Identifier 1}{Feature Identifier 1}{Data Identifier 2}{Feature Identifier 2}{CorrelationType Number}
Type: text
Multiplicity: [1]
The primary identifier of Source Dataset 1.
Type: text
Multiplicity: [1]
Version number of the primary identifier of Source Dataset 1. Where available, NULL otherwise.
Type: integer
Multiplicity: [0..1]
Version date of the primary identifier of Source Dataset 1. Where available, NULL otherwise.
Type: date time
Multiplicity: [0..1]
The primary identifier of Source Dataset 2.
Type: text
Multiplicity: [1]
Version number of the primary identifier of Source Dataset 2. Where available, NULL otherwise.
Type: integer
Multiplicity: [0..1]
Version date of the primary identifier of Source Dataset 2. Where available, NULL otherwise.
Type: date time
Multiplicity: [0..1]
Confidence value based on a comparison of feature dates between the two source features. Can be one of:
Version information is correct
Version information has potentially changed
Version information has changed
Type: text
Multiplicity: [1]
Notes: May be a constant value of the possible ones for certain relationships.
The Open Linked Identifier data product is supplied in Comma-Separated Value (CSV) format, which comes with Product Version Information files formatted as JavaScript Object Notation (JSON).
Upon downloading the data you will receive zip files of the 11 Linked Identifier relationships. The generalised naming convention for each Relationship ID is:
{Data Identifier 1}_{Feature Identifier 1}_{Data Identifier 2}_{Feature Identifier 2}_{CorrelationType Number}
For example: BLPU_UPRN_RoadLink_TOID_9
| Relationship IDs | Relationship |
|---|---|
Upon downloading the CSV data, you will have 11 zip packages for each relationship. Each zip package contains four files, for example BLPU_UPRN_RoadLink_TOID_9.zip extracts:
BLPU_UPRN_RoadLink_TOID_9.csv
Linked Identifier data (CSV)
BLPU_UPRN_RoadLink_TOID_9_versions.json
Product version information
Licence.txt
OGL Licence
UPRN_RoadLink_TOID_9_202001_description.pdf
Product description
The OS Open Linked Identifier data package also contains Product Version Information files. These are contained inside each relationship zip package as JavaScript Object Notation (JSON) format.
JSON is an open-standard file and data interchange format that uses human-readable text to store and transmit data objects consisting of attribute-value pairs and array data types.
The general structure of the metadata JSON is detailed below:
The name of the Linked_ID CSV file
Type: text
Multiplicity: [1]
The product publication date.
Type: date
Format: YYYY/MM
Multiplicity: [1]
The Linked_ID Epoch Number that the JSON file refers to. (In the format “Epoch {number}”.)
Type: text
Multiplicity: [1]
Type: Object
Multiplicity: [1]
The product name of the source product for identifier 1.
Type: text
Multiplicity: [1]
The publication date of the source product for identifier 1.
Type: date
Format: YYYY/MM
Multiplicity: [1]
The epoch number of the source product for identifier 1. If provided, in the format “Epoch {number}”.
Type: text
Multiplicity: [0..1]
Notes: Not supplied if null value.
The feature type of the source for identifier 1. Can be one of:
BLPU
Road
RoadLink
Street
TopographicArea
Type: text
Multiplicity: [1]
The identifier type of the source for identifier 1. Can be one of:
GUID
TOID
UPRN
USRN
Type: text
Multiplicity: [1]
Type: Object
Multiplicity: [1]
The product name of the source product for identifier 2.
Type: text
Multiplicity: [1]
The publication date of the source product for identifier 2.
Type: date
Format: YYYY/MM
Multiplicity: [1]
The epoch number of the source product for identifier 2. If provided, in the format “Epoch {number}”.
Type: text
Multiplicity: [0..1]
Notes: Not supplied if null value.
The feature type of the source for identifier 2. Can be one of:
BLPU
Road
RoadLink
Street
TopographicArea
Type: text
Multiplicity: [1]
The identifier type of the source for identifier 2. Can be one of:
GUID
TOID
UPRN
USRN
Type: text
Multiplicity: [1]
RoadLink_TOID_TopographicArea_TOID_2
RoadLink <-> TopographicArea
Road_TOID_TopographicArea_TOID_3
Road <-> TopographicArea
Street_USRN_TopographicArea_TOID_4
Street <-> TopographicArea
BLPU_UPRN_TopographicArea_TOID_5
BLPU <-> TopographicArea
RoadLink_TOID_Road_TOID_7
RoadLink <-> Road
RoadLink_TOID_Street_USRN_8
RoadLink <-> Street
BLPU_UPRN_RoadLink_TOID_9
BLPU <-> RoadLink
Road_TOID_Street_USRN_10
Road <-> Street
BLPU_UPRN_Street_USRN_11
BLPU <-> Street
ORRoadLink_GUID_RoadLink_TOID_12
Open Roads RoadLink <-> OSMM Highways RoadLink
ORRoadNode_GUID_RoadLink_TOID_13
Open Roads RoadNode <-> OSMM Highways RoadLink
This page aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
The relationship between the Unique Property Reference Number (UPRN) of AddressBase Premium and the Topographic Identifier (TOID) of the TopographicArea feature in the OS MasterMap Topography Layer product is extracted for all live, provisional and historic BLPU records in AddressBase Premium.
Data from the OS MasterMap Topography Layer TopographicArea feature and AddressBase Premium BLPU table are joined where the TOID equals the CROSS_REFERENCE of the AddressBase Premium Cross- Reference table and the source is equal to ‘7666MT’.
The relationship is extracted from AddressBase Premium after the release of each six weekly Epoch. Further information on the relationship extraction, including the date of extraction and product version information, are provided in the Product Version Information File.
The relationship is determined by a point in a polygon intersection between the Address seed location and the TopographicArea polygon. The relationship is performed by GeoPlace, a joint venture between Ordnance Survey and Local Government Association (LGA) who produce AddressBase.
AddressBase Premium and OS MasterMap Topography Layer are updated every six weeks but on different release cycles. Therefore, some of the version information in the product may have changed and mean that the relationship is out of sync.
A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which is defined in this relationship as:
This page aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
This relationship is between the Unique Street Reference Number (USRN) of the Street features in OS MasterMap Highways Network and the TOID of the TopographicArea of the corresponding road surface area in OS MasterMap Topography Layer.
A USRN is a unique, persistent identifier for every street, assigned in the National Street Gazetteer (NSG) to any road, footway, path, cycle track, track or passageway that forms a highway. Where possible, the geometry of streets provided in the National Street Gazetteer is spatially matched to the geometry of OS RoadLinks to provide the additional attribution captured in the NSG against detailed OS geometry.
This relationship is extracted from the relatedRoadArea attribute on the matched RoadLink(s) within OS MasterMap Highways Network – Roads product following its release. This means that this relationship will not include all USRNs in OS MasterMap Highways Network, as Street features that have not been matched to an OS RoadLink will be omitted.
Where Street features have been successfully matched to OS RoadLinks, the Street features in OS MasterMap Highways Network are aggregate features composed of one or more RoadLinks. The relationship is determined by a line in a polygon intersection between the centre line geometry of matched RoadLink(s) and the topographic area polygon. The relationship is performed by Ordnance Survey.
The two source products used to extract this relationship are on different refresh cycles. OS MasterMap Highways Network is updated monthly, whereas OS MasterMap Topography Layer is updated every six weeks. Therefore, some of the version information in the product may have changed, meaning that the relationship is out of sync. A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which is defined in this relationship as:
This page aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
This relationship is between the Topographic Identifier (TOID) of the Road features in OS MasterMap Highways Network and the TOID of the Topographic Area of the corresponding road surface area in OS MasterMap Topography Layer.
A Road feature is a link set which represents a collection of RoadLink features that share the same name (e.g. Bilston Road) or classification number (e.g. A41). The relationship is extracted from the relatedRoadArea attribute on the RoadLink feature(s) of which each Road feature is composed within the OS MasterMap Highways Network – Roads product following its release.
The relationship is determined by a line in a polygon intersection between the centre line geometry of the referenced RoadLinks of each Road feature and the TopographicArea polygon(s). The relationship is performed by Ordnance Survey while creating the OS MasterMap Highways Network – Roads product.
The two source products for these identifiers are on different refresh cycles. OS MasterMap Highways Network - Roads is updated monthly, whereas OS MasterMap Topography Layer is updated every six weeks. As this product utilises published source products, the current data available for each identifier might have changed and therefore the relationship may not still be valid.
To provide an indication of the reliability of the version information provided in this product in relation to that of the version of the features used to form the correlation in the original product, a Confidence Value is given for each relationship, which is defined as follows:
This page aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
The relationship between the Unique Property Reference Number (UPRN) and the Topographic Identifier (TOID) of OS MasterMap Highways Network - Roads is extracted for all live, provisional and historic BLPU records in AddressBase Premium. Data from the OS MasterMap Highways Network - Roads and AddressBase Premium BLPU table are joined where the TOID equals the CROSS_REFERENCE of the AddressBase Premium Cross-Reference table and the source is equal to ‘7666MI’.
The relationship is extracted from AddressBase Premium after the release of each six weekly Epoch. Further information on the relationship extraction, including the date of extraction and product version information, are provided in the Product Version Information File.
AddressBase Premium is updated every six weeks and OS MasterMap Highways – Roads is updated every four weeks. Therefore, some of the version information in the product may have changed and mean that the relationship is out of sync. To provide an indication of the reliability of the version information provided in this product in relation to that of the version of the features used to form the correlation in the original product, a Confidence Value is given for each relationship, which is defined as follows:
This page aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
This relationship is between the Topographic Identifier (TOID) of the RoadLink features in OS MasterMap Highways Network and the TOID of the TopographicArea of the corresponding road surface area in OS MasterMap Topography Layer.
The relationship is extracted from the relatedRoadArea attribute on the RoadLink features in OS MasterMap Highways Network - Roads product following its release.
This relationship is determined by a line in a polygon intersection between the RoadLink centre line geometry and the TopographicArea polygon(s). Specifications of capture can vary between the two source products, therefore not every RoadLink in OS MasterMap Highways Network will be represented by a TopographicArea. The relationship is performed by Ordnance Survey while creating the OS MasterMap Highways Network – Roads product.
The two source products for these identifiers are on different refresh cycles. OS MasterMap Highways Network - Roads is updated monthly, whereas OS MasterMap Topography Layer is updated every six weeks. Therefore, some of the version information in the product may have changed and mean that the relationship is out of sync.
A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which is defined in this relationship as:
This technical specification provides detailed technical information about OS Open Linked Identifiers. It is targeted at technical users and software developers.
OS Open Linked Identifiers is a dataset containing the authoritative relationships between Unique Property Reference Numbers (UPRNs), Unique Street Reference Numbers (USRNs) and Topographic Identifiers (TOIDs), and metadata. Identifiers are labels that are assigned to representations in a dataset. They are at the heart of how data can be effectively published, retrieved, reused and linked.
| Feature Type | Identifier Type | Source Product | Description |
|---|
OS Open Linked Identifiers enables you to connect the variety of relationships between UPRN, USRNs and TOIDs. These are extracted from premium products to provide you with the most up-to-date feature metadata sourced from AddressBase, OS MasterMap Highways Network and OS MasterMap Topography Layer. The more an identifier is used in other datasets, the more valuable the primary data becomes.
For example, OS Open Identifiers enables visualisation of data linked to the Highways RoadLink and Open Roads products. By sharing the road link mapping between Highways and Open Roads it enables data that has been collected and shared against the Highways’ premium products to be visualised in the open geometry.
Identifiers are crucial to the process of sharing information and linking together datasets, allowing them to fit into many workflows in many different types of workplace to provide powerful insights and support analytics.
A UPRN is a unique numeric identifier for every addressable location in Great Britain. The identifier is critical for property related information and can be found throughout OS's AddressBase products. An addressable location may be any kind of building, residential or commercial, or it may be an object that might not have a ‘normal’ address – such as a bus shelter or an electricity substation. UPRNs provide these addressable locations with a consistent, persistent identifier never being reused.
A USRN is a unique and persistent identifier for every street, road, track, path, cycletrack or way in Great Britain. It can be found in the OS MasterMap Highways Network products and is also a key component in OS’s AddressBase suite of products.
A TOID is a unique identifier, consisting of the letters ‘osgb’ and followed by either thirteen or sixteen digits, associated with every feature in many of Ordnance Survey’s large-scale products. The TOID is based upon the Digital National Framework concept and the principles that underpin it. In order for the TOID to be effective, it is essential that the reference given to it by OS remain unaltered in any way.
This page aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
The relationship between the Unique Property Reference Number (UPRN) and the Unique Street Reference Number (USRN) is extracted for all live, provisional and historic BLPU records and all open roads in AddressBase Premium. All information for the associated relationship is extracted from AddressBase Premium by joining the Street table to the LPI table based on USRN, and the LPI table to the BLPU table based on UPRN. Further information on the relationship extraction, including the date of extraction and product version information, are provided in the Product Version Information File.
A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which will always be defined in this relationship as:
This page aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
This relationship is between the Topographic Identifier (TOID) of the RoadLink features and the TOID of Road features in OS MasterMap Highways Network.
A Road feature is a link set which represents a collection of RoadLink features that share the same name (e.g. Bilston Road) or classification number (e.g. A41). The relationship is extracted using the reference to the
RoadLinks which make up each Road feature in the ‘link’ attribute within OS MasterMap Highways Network – Roads product following its release.
The relationship is determined by the link reference within OS MasterMap Highways Network - Roads, demonstrating the RoadLinks of which the Road features are composed.
As this relationship is determined using a single source product the version information provided will always be the same as the version of the feature used to create the correlation.
A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which will always be defined in this relationship as:
This document aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
This relationship is between the Topographic Identifier (TOID) of the RoadLink features and the Unique Street Reference Number (USRN) of Street features in OS MasterMap Highways Network.
A USRN is an 8-digit unique and persistent identifier for a street assigned by a Roads Authority or Highway Authority. Where possible, the geometry of Streets provided by the Roads or Highway Authorities is spatially matched to the geometry of OS RoadLink(s) and an aggregated geometry of the RoadLink(s) will be provided in the OS MasterMap Highways Network.
This relationship is extracted using the reference to the RoadLink(s) which have been matched to the Street
feature in the ‘link’ attribute within the OS MasterMap Highways Network – Roads product following its
release. This means that this relationship will not include all USRNs in OS MasterMap Highways, as Street features that have not been matched to an OS RoadLink will be omitted.
The relationship is determined by the link reference within OS MasterMap Highways Network, demonstrating the RoadLink feature(s) of which the matched Street features are composed. Where possible, the geometry of Streets provided by the Roads or Highway Authorities is spatially matched to the geometry of OS RoadLink(s) and an aggregated geometry of the RoadLink(s) will be provided in the OS MasterMap Highways Network.
As this relationship is determined using a single source product, the version information provided will always be the same as the version of the feature used to create the correlation.
A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which will always be defined in this relationship as:
| Confidence Value | Definition |
|---|---|
| Confidence Value | Definition |
|---|---|
| Confidence Value | Definition |
|---|---|
The relationship is determined by finding the closest RoadLink TOID from OS MasterMap Highways Network – Roads, to every BLPU of AddressBase Premium that references a USRN. The relationship is performed by a joint venture between Ordnance Survey and Local Government Association (LGA) who produce AddressBase.
| Confidence Value | Definition |
|---|
| Confidence Value | Definition |
|---|
The relationship is determined by the Local Authorities who are responsible for Addressing and Street Name and Numbering. The Local Authorities supply this information to a joint venture between Ordnance Survey and Local Government Association (LGA) who produce AddressBase.
| Confidence Value | Definition |
|---|
| Confidence Value | Definition |
|---|
| Confidence Value | Definition |
|---|
Version information is correct
The version information provided is the same as the version of the feature used to create the correlation.
Version information has potentially changed
The version information could be different from the version of the feature that was used to create the correlation.
Version information has changed
The version information provided is different from the version of the feature used to create the correlation.
Version information is correct
The version information provided is the same as the version of the feature used to create the correlation.
Version information has potentially changed
The version information could be different from the version of the feature that was used to create the correlation.
Version information has changed
The version information provided is different from the version of the feature used to create the correlation.
Version information is correct
The version information provided is the same as the version of the feature used to create the correlation.
Version information has potentially changed
The version information could be different from the version of the feature that was used to create the correlation.
Version information has changed
The version information provided is different from the version of the feature used to create the correlation.
Version information is correct | The version information provided is the same as the version of the feature used to create the correlation. |
Version information has potentially changed | The version information could be different from the version of the feature that was used to create the correlation. |
Version information has changed | The version information provided is different from the version of the feature used to create the correlation. |
Version information is correct | The version information provided is the same as the version of the feature used to create the correlation. |
Version information has potentially changed | The version information could be different from the version of the feature that was used to create the correlation. |
Version information has changed | The version information provided is different from the version of the feature used to create the correlation. |
Street | USRN (Unique Street Reference Number) | OS MasterMap Highways | An identifier allocated to a street by a local authority. |
ORRoadLink/ ORRoadNode | GUID | Open Roads | Road sections and junctions from our open data product. These features are referred to in OS Open Roads as RoadLink and RoadNode. In this product they are referred to as ORRoadLink and ORRoadNode respectively to distinguish them from the OS MasterMap Highways Networks RoadLink and RoadNode features. |
Version information is correct | The version information provided is the same as the version of the feature used to create the correlation. |
Version information is correct | The version information provided is the same as the version of the feature used to create the correlation. |
Version information is correct | The version information provided is the same as the version of the feature used to create the correlation. |
TopographicArea | TOID | OS MasterMap Topographic Layer | Polygon limited to either a building outline or road surface area. |
RoadLink | TOID | OS MasterMap Highways | Section of road from junction to junction. |
Road | TOID | OS MasterMap Highways | Collection of RoadLink with a given name. |
BLPU (Building Land Parcel Unit) | UPRN (Unique Property Reference Number) | AddressBase Premium | An address location with postal address. |
This document aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
This relationship is between the Topographic Identifier (TOID) of the Road features and the Unique Street Reference Number (USRN) of Street features in OS MasterMap Highways Network.
A Road feature is a link set which represents a collection of RoadLink features that share the same name (e.g. Bilston Road) or classification number (e.g. A41). A USRN is an 8-digit unique and persistent identifier for a street assigned by a Roads Authority or Highway Authority. Where possible, the geometry of Streets provided by the Roads or Highway Authorities is spatially matched to the geometry of OS RoadLink(s) and an aggregated geometry of the RoadLink(s) will be provided in the OS MasterMap Highways Network.
The relationship is extracted using the following:
The reference to the RoadLinks which make up each Road feature in the ‘link’ attribute of the Road
feature table.
The reference to the RoadLink(s) which have been matched to each Street feature in the ‘link’ attribute in the Street feature table within the OS MasterMap Highways Network – Roads product following its release.
Where the Road and Street features reference common RoadLink(s), the relationship is extracted.
The relationship is determined by two link references within OS MasterMap Highways Network - Roads, demonstrating where Road and Street features reference common RoadLink(s).
As this relationship is determined using a single source product the version information provided will always be the same as the version of the feature used to create the correlation. A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which will always be defined in this relationship as:
This document aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
This relationship is between the unique identifier (GUID) of the RoadLink features in OS Open Roads and the Topographic Identifier (TOID) of RoadLink features in OS MasterMap Highways Network which represent the same feature.
The relationship is extracted from the OS Open Roads Lookup table which is supplied with the OS Master Map Highways Network – Roads. This table provides the TOID of the RoadLink feature in the OS MasterMap Highways Network and the GUID of the ORRoadLink feature in OS Open Roads which represent the same feature in OS Open Roads.
This relationship is determined using the OS Open Roads Lookup table which is supplied with the OS Master Map Highways Network – Roads. This table provides the TOID of the RoadLink feature in the OS MasterMap Highways Network and the GUID of the ORRoadLink feature in OS Open Roads which represent the same feature in OS Open Roads. This relationship is created by Ordnance Survey using a spatial match between systematically sampled points along the two line feature datasets.
The two source products for these identifiers are on different refresh cycles. OS MasterMap Highways Network - Roads is updated monthly, whereas OS Open Roads is updated every six months. As this product utilises published source products, the current data available for each identifier might have changed and therefore the relationship may not still be valid.
A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which is defined as follows:
This document aims to provide all the information to evaluate if the method of associating the respective identifiers is suitable for your needs. These identifier relationships have been extracted from existing premium products and are presented in a standalone table for easy and open access to the information. It describes which product the information was extracted from, what information was extracted and how the source product derived the original association between the identifiers.
This relationship is between the non-persistent unique identifier (GUID) of the RoadNode features in OS Open Roads and the Topographic Identifier (TOID) of RoadLink features in OS MasterMap Highways Network, which represent the same feature.
The relationship is extracted from the OS Open Roads Lookup table which is supplied with the OS Master Map Highways Network – Roads. This table provides the TOID of the RoadLink feature in the OS MasterMap Highways Network and the GUID of the ORRoadNode feature in OS Open Roads which represent the same feature in OS Open Roads. This will be used where a RoadLink in OS MasterMap Highways has been simplified in the OS Open Roads product to an ORRoadNode (for example, a collapsed roundabout).
This relationship is determined using the OS Open Roads Lookup table which is supplied with the OS Master Map Highways Network – Roads. This table provides the TOID of the RoadLink feature in the OS MasterMap Highways Network and the GUID of the ORRoadNode feature in OS Open Roads which represent the same feature in OS Open Roads. This relationship is created by Ordnance Survey using a spatial match between the point and line features.
The two source products for these identifiers are on different refresh cycles. OS MasterMap Highways Network - Roads is updated monthly, whereas OS Open Roads is updated every six months. Therefore, some of the version information in the product may have changed and mean that the relationship is out of sync.
A Confidence Value is assigned to indicate the reliability of the version information provided in this product in relation to the version of the features used to form the correlation in the original product. The Confidence Value is given for each relationship, which is defined in this relationship as:
| Confidence Value | Definition |
|---|---|
| Confidence Value | Definition |
|---|---|
| Confidence Value | Definition |
|---|---|
Version information is correct
The version information provided is the same as the version of the feature used to create the correlation.
Version information is correct
The version information provided is the same as the version of the feature used to create the correlation.
Version information has potentially changed
The version information could be different from the version of the feature that was used to create the correlation.
Version information has changed
The version information provided is different from the version of the feature used to create the correlation.
Version information is correct
The version information provided is the same as the version of the feature used to create the correlation.
Version information has changed
The version information provided is different from the version of the feature used to create the correlation.
